<template lang="">
    <div>
        <h1>{{message}}</h1>
        <button @click="greet">greet</button>
    </div>
</template>
<script>
export default {
    data(){
        return{
            message:'Hello,vue 3!'
        }
    },
    methods:{
        greet(){
            //$attrs 接收父组件传给当前组建的 name属性
            this.message='Hello,' + this. $attrs.name+'!'
        }
    } 
}
</script>
<style>
</style>